Energy Analysis Method for Uniaxial Compression Test of Sandstone under Static and Quasi-Dynamic Loading Rates

Table 1

Energy evolution law of uniaxial incrementally loading-unloading tests.

Load (kN)	Loading rates (mm/s)
	1.0 × 10^−3(Specimen T1)		Elastic energy (J)		1.0 × 10^−2(Specimen T3)		5.0 × 10^−2(Specimen T4)		1.0 × 10^−1(Specimen T5)
	Elastic energy (J)	Input energy (J)	Elastic energy (J)	Input energy (J)	Elastic energy (J)	Input energy (J)	Elastic energy (J)	Input energy (J)	Elastic energy (J)	Input energy (J)
10	0.5336	1.3542	0.5283	1.2421	0.5347	1.2415	0.5432	1.2641	0.5406	1.2124
20	1.7882	3.0105	1.7981	2.9894	1.8063	3.2947	1.7941	3.0474	1.8023	2.8142
30	3.3095	6.3963	3.3124	6.2854	3.3009	6.0781	3.3376	5.7264	3.3100	5.2241
40	5.3120	10.0936	5.3214	9.5662	5.3421	9.2872	5.3845	9.0275	5.4011	8.4547
50	7.1032	14.6541	7.1842	14.0355	7.1891	13.4601	7.2064	13.0073	7.2219	12.4678
60	9.3945	19.1239	9.3867	18.5455	9.4167	17.8934	9.4054	17.0645	9.3972	16.1347
70	—	—	—	—	11.4427	22.5211	11.4210	21.8534	11.4348	20.3556